Format all tests.

tests/language_strong/operator2_test.dart

Index: tests/language_strong/operator2_test.dart
diff --git a/tests/language_strong/operator2_test.dart b/tests/language_strong/operator2_test.dart
index 66d0ba593414116753371400cfb9774a0909a899..99c770b58011524c573a98b501b89197e693c267 100644
--- a/tests/language_strong/operator2_test.dart
+++ b/tests/language_strong/operator2_test.dart
@@ -7,10 +7,11 @@ import "package:expect/expect.dart";
 
 class Helper {
   int i;
-  Helper(int val) : i = val { }
+  Helper(int val) : i = val {}
   operator [](int index) {
     return i + index;
   }
+
   void operator []=(int index, int val) {
     i = val;
   }
@@ -25,7 +26,6 @@ class OperatorTest {
   }
 }
 
-
 main() {
   OperatorTest.testMain();
 }